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Issue 102, 2016, Issue in Progress
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A colorimetric and “turn-on” fluorimetric chemosensor for the selective detection of cyanide and its application in food samples

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Abstract

A novel highly selective isonicotiamide-based chemosensor HY for cyanide was successfully designed and synthesized, which showed both colorimetric and fluorescent turn-on responses for cyanide ions in aqueous. This structurally simple chemosensor could detect CN anion over other anions in aqueous solution DMSO/H2O (v/v = 7 : 3) undergo deprotonation reaction. Results showed that the chemosensor HY exhibited 14-fold enhancement in fluorescence at 552 nm and showed yellow fluorescence under the UV-lamp after the addition of CN in aqueous solution. An obvious change in color from pale yellow to yellow that could be detected by naked eye. We have successfully utilized the above CN and H+ for the fabrication of INHIBIT molecular logic gates, using CN and H+ as chemical inputs and the fluorescence intensity signal as the output. Moreover, the detection limit on fluorescence response of the sensor to CN is down to 5.12 × 10−8 M by titration method. Test strips based on HY were obtained, which could be used as a convenient and efficient CN test kit to detect CN in aqueous solution. Furthermore, the sensor could detect the CN in food sample as a sample and effective method.

Graphical abstract: A colorimetric and “turn-on” fluorimetric chemosensor for the selective detection of cyanide and its application in food samples

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Publication details

The article was received on 24 Jun 2016, accepted on 28 Sep 2016 and first published on 17 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA16378E
Citation: RSC Adv., 2016,6, 100401-100406
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    A colorimetric and “turn-on” fluorimetric chemosensor for the selective detection of cyanide and its application in food samples

    J. Hu, Y. Sun, J. Qi, P. Pei, Q. Lin and Y. Zhang, RSC Adv., 2016, 6, 100401
    DOI: 10.1039/C6RA16378E

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